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3x+1=37
3x=36
x=12
p=2*12+3=27cm
l=12-2=10cm
74 = 6x+2
74-2 = 6x
72 = 6x
x = 72/6 = 12
panjang persegi = 2x+3 = 2(12) + 3 = 24 + 3 = 27
lebar persegi = x-2 = 12 - 2 = 10